German accessories designer Affenzahn has created a collection of sustainable backpacks for function and fashion. Made from recycled PET bottles and accredited by the Fair Wear Society, each design is in the shape of a friendly animal and has fun details such as a tongue that goes in and out, as well as practical buckles and straps to keep supplies secure. Explore tigers, elephants and even koalas and flamingos, all ready for adventures at any time of the day.